$12\mathrm{.}35$ Three equal impedances, $60+$ j$30$ each, are delta$-$connected to a $230-$V rms$,$ three$-$phase circuit. Another three equal impedances, $40+$ j$10$ each, are wye$-$connected across the same circuit at the same points. Determine:

$($a$)$ the line current

$($b$)$ the total complex power supplied to the two loads

$($c$)$ the power factor of the two loads combined